<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="root">
        <p>{{name}}</p>
        <p>{{changename}}</p>
    </div>
</body>
</html>
<script>
 let vm = new Vue({
     el:"root",
     data:{
         name:"html"
     },
     computed:{
         changename(){
             return this.name.toUpperCase();
         }
     }

 })
</script>